[PATCH 0/3] riscv: Per-thread envcfg CSR support

[Samuel Holland]

Hi Deepak,

On 2024-06-07 5:01 PM, Deepak Gupta wrote:
> Hi Samuel,
> 
> Thanks for working on these.
> Patches looks good to me. I've given some suggestion for patch organization
> and squashing. You can take it or leave it.

Thanks for the review! I'd like to keep the patches separate so it is clear
which part is the behavior change (patch 1), and which part is the new
functionality (patch 2).

Regards,
Samuel

> Other than that.
> 
> Reviewed-By: Deepak Gupta <debug at rivosinc.com>
> 
> On Wed, Jun 05, 2024 at 01:56:44PM -0700, Samuel Holland wrote:
>> This series (or equivalent) is a prerequisite for both user-mode pointer
>> masking and CFI support, as those are per-thread features are controlled
>> by fields in the envcfg CSR. These patches are based on v1 of the
>> pointer masking series[1], with significant input from both Deepak and
>> Andrew. By sending this as a separate series, hopefully we can converge
>> on a single implementation of this functionality.
>>
>> [1]:
>> https://lore.kernel.org/linux-riscv/20240319215915.832127-6-samuel.holland@sifive.com/
>>
>>
>> Samuel Holland (3):
>>  riscv: Enable cbo.zero only when all harts support Zicboz
>>  riscv: Add support for per-thread envcfg CSR values
>>  riscv: Call riscv_user_isa_enable() only on the boot hart
>>
>> arch/riscv/include/asm/cpufeature.h |  2 +-
>> arch/riscv/include/asm/processor.h  |  1 +
>> arch/riscv/include/asm/switch_to.h  |  8 ++++++++
>> arch/riscv/kernel/cpufeature.c      | 13 +++++++++----
>> arch/riscv/kernel/smpboot.c         |  2 --
>> arch/riscv/kernel/suspend.c         |  4 ++--
>> 6 files changed, 21 insertions(+), 9 deletions(-)
>>
>> -- 
>> 2.44.1
>>